OP

GPT-4.5

by OpenAI

Tracked text vision API Available

Tracked release

This page is live so the release is discoverable quickly, but it is not treated as a fully evaluated ranked model yet. Pricing, context, availability, and source notes may already be present while benchmark and quality coverage are still being collected.

Input Price

$75.00

per 1M tokens

Output Price

$150.00

per 1M tokens

Context Window

128K

tokens

Max Output

16.4K

tokens

Quality Score

79

out of 100

Value Score

6

quality per $

Details

Provider
OpenAI
Released
27 Feb 2025
Speed
N/A
Open Source
No
API Available
Yes
Pricing Source
openai.com/api/pricing

Notes

Codenamed Orion; improved EQ and reduced hallucinations; deprecated Aug 2025 Speed data hidden until it is refreshed from a current live measurement source.

Regional Availability

Open availability board
API Provider baseline

OpenAI API access

OpenAI API access is limited to officially supported countries and territories.

Broad supported-country coverage across the UK, much of Europe, the Americas, Africa, Asia, and Oceania. The official article is the source of truth for the exact list.

Known available

United Kingdom United States Canada France Germany Japan
Last verified 09 Apr 2026, 20:49 UTC OpenAI Help Center

Benchmark Scores

Chatbot Arena ELO

1300

Source: LMSYS

HumanEval

91

Source: OpenAI

MMLU

90.2

Source: OpenAI

MATH-500

82

Source: OpenAI

SimpleQA

62.5

Source: OpenAI

GPQA Diamond

62

Source: OpenAI

MT-Bench

8.8

Source: OpenAI

Price History

Blended price trend (input + 3×output / 4)

$131.25 → $131.25
↑ 0%
Date Input $/1M Output $/1M Change
25 Apr 2026 $75.00 $150.00 —
25 Apr 2026 $75.00 $150.00 0.0%
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